We have four assembly lines to support the production of turn key products of our customers. We also have long term collaborated suppliers to help us make those components required for the turn key product but we couldn't manufacture in house (screws, die casting parts, special parts, etc.). Our purchasing department uses strict supplier management system to perform periodic evaluation of suppliers and ensures reliable suppliers of purchased components. Every time when sourced parts arrive in our factory, quality department will inspect them carefully according to procedures defined in ISO9001 quality system. Parts will be put to storage only after they meet quality requirement.